Gas-engine.



PATENT@ MAY ze, i907. :mm HENRY mail; om HMS MGHe Jl) N ll'llNlY BlltCl'l AND JOHN HAYE BIRCH, UF CltAWFORDSVlLL l, iNDiANA.

GAS-ENGENE.

Patented May 28, 1907'.

Application filed March 21.1907, Serial No. 363,590.

To 11]/ uf//ont it mn-,1,1 neither/1,.'

Be it known that we, Jeux .liever Einen and Jeux liars Briten, citizens oi' the 1 United States, residing at Crawlordsville, in l the county of Montgomery and State olii indiana, have invented certain new and uselul improvements inilas-lngines, olt which the following is a si eeilieation.

` 'lhe objeet oi' our invention is to produce an ellcient yet. simple means l'or operating the exhaust valves oi engines by ineens ol' pressure generated in the combustion chamber by a combustion of the charge.

`The accompanying drawing, which is a longitudinal seetion through the cylinder, illustrates our invention.

A1n the drawings 1() indicates any desired i'orin of cylinder having a piston 11 inounted therein. Coininunieating with cylinder at its sparking end, is a passage 12 into which leads an inlet passage 13 provided with an inwardly opening valve 14 ol" any desired forni. Leading i'roni passage 12 is an. exhaust passage 15 having an inwardly opening exhaust valve 16 provided with a stein 17, a spring 18 being provided to normally hold the valve 16 closed, the spring 1S being stronger than the spring 14 which is used to normally hold the inlet valve 11i. Formed in the side of cylinder 10 is a siuall cylinder 2l) connnunieating with the combustion ehainber by means of aninlet passage 21 and with the erank base by an outlet passa-ge 22. Mounted in eylin der 2U is a sniall piston 23 which is normally held in its inner position by alight spring 24. Secured to the outer end of cylinder 2() is a bracket 25 provided with a bearing 26 arranged in alinement with the valve stein 17. Slidingly inounted in bearing 26 is a pin 27. Bracket" is also provided withV a socket 2S which is ali-ned with bearing 2G and mounted in this socket is a pin 29 which may be vertically adjusted in socket 28 by any suitable means, such for instance as the adjusting screw 3l). Pivoted to the inner ends ot' pins 27 and 29 are' two links 31 and 32 respectively, which are connected at their inner ends to a link 33 which, in turn, is pivoted to the iston 23, thus forming a toggle connection between the piston 24 and the pin 27. l

'lhe operation is. as follows2-The normal positions of the parts are indicated in' full lines. Supposing a charge to have entered l the cylinder and to have been compressed, the downward stroke of the piston 11 will be a power stroke and, when the piston 11 has the port 21 and thereupon the pressure of the ignited Charge will pass through said port into cylinder 20 so as to urge piston 23 to the right, thus straightening the toggle lever and the position indicated in dotted lines, thus permitting the escapo of the burnt' gases. Before there is any material reduction of pressure, however, piston 1.1 will inove backward so as to close port 21 and, port 22 being also closed, the pressure within cylinder 20 will be maintained so as to hold the exhaust valve open until the piston 11 has nearly reached the end of its return stroke, whereupon said piston will uncover the exhaust port 22 ol cylinder 2O so that the pressure within said cylinder may exhaust into the crank base and spring 24 operate to return spring 1S -will close the exhaust valve.` On the next down stroke of the power piston a new charge will be drawn into the combustion chamber and this new'oharge, having no pressure above atmospheric pressure, will not operate piston 23 when port 21v is uncovered so that the exhaust valve 16 will reinain closed during the Compression stroke of the power piston.

No claim as our invention zcombination, with the combustion chamber, the power piston therein and an exhaust valve controlling the passage leading from said combustion ehaniber, of a supplemental cylinder having a passage leading .to the conisage, both of said'passages of the `suppleinental cylinder being opened and closed by the movement of the power piston, a piston mounted in the supplemental cylinder, and a pair of toggle links connected with said piston and arranged to operate the exhaust valve.

2. In an internal combustion engine, the combination, with the combustion ehaniber, the power piston therein and an Aexhaust valve controlling the passage leading from said combustion chamber, of a supplemental cylinder having a passage leading to the the parts to nornial position, whereupon 1. in an internal combustion engine, the

bustion chamber and having an exhaust pas` moved to the end oi its stroke, it will uncover eausing pin 27 to nieve the exhaust valve to IOO IOS

combustion chamber and having van exhaust 22 www3 passage, both of said pl'ssages of the sum ln vn'tncss whereof, we haw/@hereunto set 1o lemenml cylinder being opened and closad g our hands and seals at. Cmwfurdsville, Indiy the movement of the @wer piston, a pisi ima, this 'wth day of March, A. D. one thou-A ton mounted ,in the supp @mental Cylinder, a @and nine hundred. und svvvn. pair of toggle links connected with said pis k JHN IUCN RY BRCH. lL. si]

t0n, un adjustablc abutmrrnt for eine mul ofi JHN HATS BIRCH. {L. 5.] said toggle,.a sliding piu adapted tu engag@ Witnesses: A 'the exhaust valve stmn, and :L suitable sup- JOS. E. FOULKEa,

port for said pin. n WILIJAM HAWKINB. 

